Strength & Deep & Smooth -Uni-ball Extra Fine Diamond Infused Pencil Leads, 0.3 Mm-hb-nano Dia 15 Leads X 3 Pack/total 45 Leads strength & Deep & smooth -Uni-ball Extra Fine Diamond Infused Pencil Leads, 0.3 Mm-hb-nano Dia 15 Leads X 3 Pack/total 45 Leads